Annealing-furnace.



' E. H. HOLMES.

ANNEALING P UHNAOB.

' APPLIUATION Hmm ulm, laos. 995,460.

Patented June 20,1911'.

a SHEETS-Smm 2.

www1-:551:15:

INVENTQR ATTORNEY 1m: Nomen; :1r-:1 aus cu., WASH/Nuon, u, s.

E. H. HOLMES.

ANNEALING PURNAGB.

APPLICATION FILED JAN.2, 1908.

' Patented June 20, 1911.

3 SHEETS-SHEET 3.

ATTORN EIY UIT EDWARD H. HOLMES, OF BEAVER, PENNSYLVANIA.

ANNEALING-FURNACE.

Application filed January 2, 1908.

To all whom it may concern:

Be it known that I, EDWARD H. HOLMES, of Beaver, in the county of Beaverand State of Pennsylvania, have invented certain new and usefulImprovements in Annealing- Furnaces, of which the following is aspecification.

In the accompanying drawings, which illustrate applications of myinvention, Figure 1 is a part side elevational view and a part sectionalview of an annealing furnace embodying my invention; Fig. 2.alongitudinal sectional view taken on line 2-2 of Fig. 1; Fig. 3 a crosssectional view, the section being taken on line 3-3 of Fig. l; Fig. 1 asimilar view taken on line 4 1 of Fig. 2; Fig. 5 a detail verticalsectional view of the rear of the furnace taken on line 5-5 of Fig. 2;and Fig. 6 an enlarged detail view of a lire-box.

Referring to the drawings, the annealingfurnace as illustrated and aspreferred comprises side-walls 1 and 2, front and rear endwalls 3 and 4and an arched roof 5. The front and rear walls proper of the furnace areeach constructed with an opening 6 as is usual in this class offurnaces.

7 designates the annealing-chamber of the furnace adapted to contain thearticles to be annealed. The annealing-chamber comprises side-wallsS and9, front and rear walls 10 and 11, and a floor 12. The top of thechamber is closed by a series of metal or asbestos plates 13 extendingacross the chamber and supported on the side-walls thereof. In practice,plates 13 are covered with slag or scale, as shown by the numeral 14.This construction produces a practically air-tight annealing-chamber.

In order to introduce and to remove the articles to be annealed, thefront and rear walls proper of the annealing-chamber are each formedwith a passage, said passages, after the articles are placed within thechamber, are closed by built up front and rear partitions or walls 15and 16.

17 designate front and rear doors of the furnace.

Extending under and adjacent to the floor 1 2 of the annealing-chamber,I provide a series of combustion passages 18 which passages communicatewith combustion-chambers or fire-boxes 19 formed in each of thesidewalls 1 and 2. These combustionchambers or fire boxes 19 may beutilized when coal is used as a fuel or when gas or Specication ofLetters Patent.

Patented June 20, 1911. Serial No. 408,994.

oil is used, my invention being designed for coal, gas, or oil. Thefire-boxes or combustion-chambers are preferably arranged in alternateorder in each side-wall of the furnace as particularly shown by Fig. 2.Each of the horizontal combustion passages 1S communicates with the.vertical passage 20 located between the side-walls of theannealing-chamber and the sidewalls of the furnace, thereby permittingthe heated air and products of combustion to travel up the sides of theannealing-chamber and into a large open chamber 21 located between thetop of the annealing-chamber and the arched roof 5 of the furnace. Theprovision of t-he large chamber 21 is important in that it provides forthe combustion of the fuel that has not already taken place in thepassages 1S and 20; also it provides a construction whereby the furnaceis more quickly cooled after a heat.

22 designates the furnace stack which is preferably placed as shown atthe rear of. the furnace or at the rear of a series ofannealing-furnaces.

As shown by the arrows the direction of the heated air after it reacheschamber 2l is toward the rear and front of the furnace passing over thetop of the annealing-chamber to either the rear-flue 23 or to the frontflue 24 and from said flues 23 and 24: into passage 25 and from thenceinto the stack.

26 designates a damper for controlling passage 25.

lVhen coal is used as the fuel, I employ an air-blast which blast isdelivered to the respective fire-boxes through pipes 27, 28 and 29.

7What I claim is:

1.- In an annealing furnace, the combination with an annealing-chamber,of a series of combustion-chambers arranged in one.

side-wall of the furnace, flues extending under the Hoor of theannealing-chamber and in communication with the combustionchambers, aseries of combustion-chambers arranged in the opposite side-wall of thefurnace and alternating with the first mentioned combustion-chambers, achamber between the top of the annealing chamber and the roof of thefurnace, side-fines, front and rear end flues, a stack at one end of thefurnace, and a conduit in communication with the front and rear iues andwith the stack.

2. In an annealing-furnace, the combination with an annealing-chamber,of a series of combustion-chambers arranged in one side wall of thefurnace in communication with passages extending under the floor of theannealing-chamber, a series of combustion-chambers arranged in theopposite side wall of the furnace and alternating with the firstmentioned combustion-chambers, a large open chamber between the top ofthe annealing-chamber and the roof of the furnace, side flues betweenthe side walls of the annealing-chamber and the` furnace, front and rearflues, a stack at one end of the furnace, and a passage or flue incommunication with the front and rear flues and with the stack.

3. In an annealing-furnace, the combination with an annealing-chamber,of a series of combustion-chambers arranged in one side wall of thefurnace in communication with passages extending under the floor of theannealing-chamber, a series of combustion-chambers arranged in theopposite side wall of the furnace and alternating' with the firstmentioned combustion-Chambers, a large open chamber between the top 0fthe annealing-chamber and the roof of the furnace, side flues betweenthe side walls of the annealing-chamber and the furnace, front and rearflues, a stack at one end of the furnace, a passage or flue incommunication with the front and rear iiues and with the stack, and adamper in said last mentioned passage.

4. In an annealing furnace, the combination with an annealing-chamber,of a series of combustion-chambers arranged in a sidewall of thefurnace, a series of iiues extending under the floor of theannealingchamber, a chamber between the top of the annealing-chamber andthe roof of the fur- 40 nace, side flues, front and rear end flues incommunication with the chamber over the annealing-chamber, a stacklocated at one end of the furnace, a conduit located below thecombustion-chambers, said end flues contop of the annealing chamber inopposite directions and down the end walls thereof. In testimony whereofI aix my signature 1n presence of two witnesses.

EDVARD H. HOLMES.

IVitnesses STANLEY M. LANGDoN, W. G. DOOLITTLE.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

